The Sharingan from Sasuke could be used to analyze the weaknesses of Shadows more effectively. Then, a Persona with the right elemental or skill type could be summoned to exploit those weaknesses. It's like combining Sasuke's detective - like ability with the offensive power of a Persona.
For a character like Sakura, her medical ninjutsu could be used to heal the Persona users during battles in the Metaverse. And in return, the Persona's power could be used to enhance her physical attacks. Maybe her Persona gives her the ability to use her chakra more efficiently, so when she punches or kicks, it has the added force of the Persona's power, creating a unique combination of her medical and combat skills.
One way to combine their powers is through Naruto's chakra control and Doraemon's Propeller on Head gadget. Naruto could use his chakra to power the Propeller on Head, allowing for faster and more efficient flight. This would give Naruto a new form of mobility in addition to his ninja skills. Additionally, Doraemon's Translation Gum could be used by Naruto and his friends to communicate with characters from different regions or even different dimensions in the fanfiction. This would open up new storylines and interactions, as they could now understand and work with a wider range of characters.
Well, it could be that there's a plot device like an ancient artifact. This artifact might have the power to draw out and combine the Akatsuki powers. The Akatsuki members themselves might be tricked into contributing their powers to this artifact, and then the protagonist or an antagonist gets hold of it and gains all those combined powers. It's a common trope in fanfiction to use such magical or mysterious items to bring about extraordinary power combinations.
Well, in fanfiction, Naruto's chakra - based powers like the Rasengan could be combined with Superman's super strength. For example, Naruto could use his chakra control to enhance Superman's punches, making them even more powerful. Or Superman's heat vision could be mixed with Naruto's fire - style jutsu to create a more intense and unique attack.
Naruto's Rasengan could be combined with Wanda's energy manipulation. She could enhance the power of the Rasengan with her red energy, making it even more destructive.
In a fanfiction, they could also combine their powers for a defense mechanism. Naruto could create a chakra shield while Kuroyukihime projects a virtual layer of protection around it. This double - layered defense would be extremely difficult for enemies to penetrate. Also, Naruto's shadow clone jutsu could be used in the virtual world with Kuroyukihime's guidance to confuse opponents and carry out complex strategies.
Well, Naruto could use his chakra to enhance Inuyasha's attacks. For instance, if Inuyasha is about to use the Wind Scar with his Tessaiga, Naruto could channel some of his chakra into the blade, making the attack even more powerful. In return, Inuyasha's demon blood could give Naruto some temporary enhancements. His speed and strength might increase, like when he goes into his Nine - Tails Chakra mode.
Well, Naruto's Rasengan could be combined with a Shen Gong Wu. For example, if there's a Shen Gong Wu that can enhance the power of a spherical object, it could be used to supercharge the Rasengan. The Xiaolin Dragons' elemental powers could also be combined with Naruto's shadow clone jutsu. They could create clones that have the powers of fire, water, etc., just like the dragons.
One way could be that Naruto, through some sort of ritual or encounter, gains the ability to summon parts of Trihexa's power. He could then incorporate these powers into his fighting style. He might use Trihexa's power of destruction in a more controlled way, like when he's facing really tough opponents. He could also use Trihexa's unique energy signature to disrupt enemy jutsus or defenses, since it's likely to be something very different from what most characters in the Naruto world are used to.
In fanfiction, Naruto's shadow clone jutsu could be combined with Goku's Instant Transmission. For example, Naruto creates multiple clones and they all use Instant Transmission simultaneously to surround an enemy. This would be a very effective strategy.
Naruto's ability to use chakra and his various jutsu like the Rasengan could be combined with Masane's powers in interesting ways. For instance, Masane could use her powers to enhance Naruto's speed, allowing him to deliver a more powerful Rasengan. Or Naruto could use his shadow clone jutsu and each clone could be paired with Masane to perform coordinated attacks. They could also combine their energy sources, Naruto's chakra and Masane's power essence, to create a super - attack to defeat a really strong enemy.